Grundfos MGE 71 Series User manual

MGE 71, MGE 80
MGE 90 - MGE 132
Basic
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions.
CONTENTS
Page
1. Symbols used in this document
2. General description
Grundfos MGE 71, MGE 80, MGE 90, MGE 100, MGE 112 and
MGE 132 are fan-cooled, asynchronous, squirrel-cage motors
designed according to current IEC, DIN and VDE guidelines and
standards. A frequency converter is integrated in the terminal
box.
The motors can be used for an open-loop system in which the
setpoint signal is used as a control signal.
The motor speed and thus the motor output can be
remote-controlled by means of an external 0-10 V signal or by a
potentiometer.
The motors incorporate
• inputs for external potential-free contacts for start/stop and
an external setpoint signal
• an output for a potential-free signal.
The motors are only intended for machines with a square torque
characteristic, e.g. ventilators or centrifugal pumps.
3. Identification
The motor can be identified by means of the nameplate on the
terminal box.
Fig. 1 Nameplate
1. Symbols used in this document 2
2. General description 2
3. Identification 2
3.1 Type key 3
4. Installation 3
4.1 Handling 3
4.2 Motor cooling 3
4.3 Outdoor installation 3
4.4 Drain holes 3
4.5 Cable entries 3
4.6 Terminal box position 3
5. Electrical connection - single-phase motors 4
5.1 Mains switch 4
5.2 Protection against electric shock - indirect contact 4
5.3 Additional protection 4
5.4 Motor protection 4
5.5 Protection against mains voltage transients 4
5.6 Supply voltage 4
5.7 Start/stop of motor 4
5.8 Other connections 5
6. Electrical connection - three-phase motors 5
6.1 Mains switch 5
6.2 Protection against electric shock - indirect contact 5
6.3 Additional protection 6
6.4 Motor protection 6
6.5 Protection against mains voltage transients 6
6.6 Protection against phase unbalance 6
6.7 Supply voltage 6
6.8 Start/stop of motor 6
6.9 Other connections 7
7. Signal cables 7
8. Motor control 7
8.1 Motor speed control 7
8.2 Start/stop input 7
9. Indicator lights and signal relay 8
10. Megging 9
11. Technical data - single-phase motors 9
11.1 Supply voltage 9
11.2 Leakage current 9
11.3 Inputs/output 9
12. Technical data - three-phase motors 9
12.1 Supply voltage 9
12.2 Leakage current 9
12.3 Inputs/output 9
13. Other technical data 10
13.1 Sound pressure level 10
14. Disposal 10
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
Warning
If these safety instructions are not observed, it may
result in personal injury.
Caution
If these safety instructions are not observed, it may
result in malfunction or damage to the equipment.
Note
Notes or instructions that make the job easier and
ensure safe operation.
TM03 0001 3704

English (GB)
3
3.1 Type key
4. Installation
The motor must be secured to a solid foundation by bolts through
the holes in the flange or the base plate.
4.1 Handling
Always use the eyebolts fitted in the bores when lifting the motor.
4.2 Motor cooling
To ensure sufficient cooling of motor and electronics, the
following must be observed:
• Place the motor in such a way that sufficient cooling is
ensured.
• The temperature of the cooling air must not exceed 40 °C.
• Cooling fins and fan blades must be kept clean.
4.3 Outdoor installation
When installed outdoors, the motor must be provided with
a suitable cover to avoid condensation on the electronic
components. See fig. 2.
Fig. 2 Examples of covers
4.4 Drain holes
When the motor is installed in moist surroundings, the bottom
drain hole should be open. The enclosure class of the motor is
then changed from IP55 to IP44. The function of the drain holes is
to drain off water which has entered the stator housing, e.g.
condensed water.
MGE 71 and MGE 80
The motor has a plugged drain hole on the drive side. The flange
can be turned 90 ° to both sides or 180 °.
Fig. 3 Drain holes
MGE 90 to MGE 132
B3 mounting
The motor has two plugged drain holes on the drive side.
The flange can be turned 180 °.
B14 and B5 mounting
The motor has three plugged drain holes on the drive side.
The flange can be turned 180 °.
Fig. 4 Drain holes
4.5 Cable entries
MGE 71 and MGE 80
• 2 M16/8 screwed cable entries, cable diameter ∅4 to ∅10.
• 1 M20/10 screwed cable entry, cable diameter ∅10 to ∅14.
MGE 90 to MGE 132
• 2 M16/8 screwed cable entries, cable diameter ∅4 to ∅10.
• 1 M25/6 screwed cable entry, cable diameter ∅9 to ∅17.
4.6 Terminal box position
Fig. 5 Permissible terminal box positions
Example MG E 80 - B 2 -19 FT 100 -C 1
Motor Grundfos
Electronic control
Frame size (centre line height of
motor shaft in mm, foot-mounted
motor)
Size of foot:
S (small)
M (medium)
L (large)
Length of stator core:
A
B
C
Number of poles:
2
4
6
Shaft end diameter [mm]
Flange version:
[ ] (B3)
FF (free holes, B5)
FT (tapped holes, B14)
Pitch circle diameter [mm]
Model designation
Efficiency class:
1=IE2motor
3 = IE3 motor
[ ] = No efficiency defined (single phase motors)
Note
In order to maintain the UL/cURus approval,
additional installation procedures must be followed.
See page 11.
Caution
Never lift the motor in the terminal box.
TM00 8622 0101 - TM02 8514 0304
TM02 9037 1604TM02 9050 1604TM02 9343 2404
B3 B14 B5
B5B14B3

English (GB)
4
5. Electrical connection - single-phase motors
5.1 Mains switch
The motor must be connected to an external all-pole mains switch
with a contact separation of at least 3 mm in each pole according
to IEC 364.
5.2 Protection against electric shock - indirect contact
Protective earth conductors must always have a yellow/green
(PE) or yellow/green/blue (PEN) colour marking.
5.3 Additional protection
If the motor is connected to an electric installation where an earth
leakage circuit breaker is used as additional protection, this
circuit breaker must be marked with the following symbol:
The leakage current of the motor can be found in section
11.2 Leakage current.
5.4 Motor protection
The motor requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking (IEC 34-11: TP 211).
5.5 Protection against mains voltage transients
The motor is protected against mains voltage transients
in accordance with EN 61800-3.
5.6 Supply voltage
• 1 x 230-240 V - 10 %/+ 10 %, 50/60 Hz, PE
• 1 x 200-220 V - 10 %/+ 10 %, 50/60 Hz, PE
• 1 x 220-240 V - 10 %/+ 10 %, 50/60 Hz, PE (MGFlex)
• 110-415 VDC, PE (MGFlex).
The supply voltage and frequency are marked on the motor
nameplate. Please make sure that the motor is suitable for the
power supply on which it will be used.
The wires in the motor terminal box must be as short as possible.
Excepted from this is the protective earth conductor which must
be so long that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
For maximum backup fuse, see section 11.1 Supply voltage.
Fig. 6 Example of a mains-connected motor with mains
switch, back-up fuses and additional protection
Fig. 7 Mains connection
5.7 Start/stop of motor
When the motor is switched on via the mains, it will start after
approx. 5 seconds.
If a higher number of starts and stops is desired, the input for
external start/stop must be used when starting the motor.
When the motor is started via an external on/off switch, it will start
immediately.
Caution
The user or the installer is responsible for the
installation of the correct earthing and protection
according to valid national and local standards. All
operations must be carried out by a qualified
electrician.
Warning
All electric supply circuits must be interrupted before
working in the motor terminal box.
Warning
Never make any connections in the motor terminal
box unless the power supply has been switched off
for at least 5 minutes.
Warning
The motor must be earthed and protected against
indirect contact in accordance with national
regulations.
Note
When an earth leakage circuit breaker is selected,
the total leakage current of all the electrical
equipment in the installation must be taken into
account.
ELCB
MGE 71 and MGE 80
TM02 0792 0101
MGE 71 and MGE 80
TM02 0796 1504
Warning
If the supply cable is damaged, it must be replaced
by the manufacturer, the manufacturer's service
partner or similarly qualified persons in order to avoid
a hazard.
Caution
The number of starts and stops via the mains voltage
must not exceed 4 times per hour.
N
PE
L
N
L
PE
ELCB
PE
L
N

English (GB)
5
5.8 Other connections
The connection terminals of external potential-free contacts for
start/stop, external setpoint signal and relay signal are shown in
fig. 8.
•Inputs (external start/stop and setpoint signal, terminals 2-6).
All inputs (group 1) are internally separated from the
mains-conducting parts by reinforced insulation and
galvanically separated from other circuits.
All control terminals are supplied by protective extra-low
voltage (PELV), thus ensuring protection against electric
shock.
•Output (signal relay, terminals NC, C, NO).
The output (group 2) is galvanically separated from other
circuits. Therefore, the supply voltage or protective extra-low
voltage can be connected to the output as desired.
•Mains supply (terminals N, PE, L).
A galvanically safe separation must fulfil the requirements for
reinforced insulation including creepage distances and
clearances specified in EN 61800-5-1.
Fig. 8 Connection terminals
6. Electrical connection - three-phase motors
6.1 Mains switch
The motor must be connected to an external all-pole mains switch
with a contact separation of at least 3 mm in each pole according
to IEC 364.
6.2 Protection against electric shock - indirect contact
Protective earth conductors must always have a yellow/green
(PE) or yellow/green/blue (PEN) colour marking.
The leakage current of the motor can be found in section
12.2 Leakage current.
EN 50178 and BS 7671 specify the following:
Leakage current > 3.5 mA
The motor must be stationary and installed permanently.
Furthermore, it must be connected permanently to the power
supply.
• The earth connection must be carried out as duplicate
conductors.
Leakage current > 10 mA
If the installation includes several mains-connected units and the
total leakage may be > 10 mA, the demands on the earth
connection are tightened.
The motor must be stationary and installed permanently.
Furthermore, it must be connected permanently to the power
supply.
In addition, tightened precautions as regards earth connection
must be observed.
One of the following installation examples must be used:
• A single protective earth conductor having a cross-sectional
area of 10 mm2.
• Separate duplicate conductors each having a minimum
cross-sectional area of 4 mm2.
• A protective earth conductor contained in a cable conduit,
trunking or cable tray so forming a duplicate conductor.
Note
If no external on/off switch is connected, short-circuit
terminals 2 and 3 using a short wire.
Caution
As a precaution, the wires to be connected to the
following connection groups must be separated from
each other by reinforced insulation in their entire
lengths:
MGE 71 and MGE 80
TM02 0839 1504
10K
RUN
STOP
NC C NO N PE L
65432
0/4-20 mA 0-10 V
Change of direction
of rotation
6: GND (frame)
5: +10 V
4: Setpoint input
3: GND (frame)
2: Start/stop
Group 2
Group 3
Group 1
Caution
The user or the installer is responsible for the
installation of the correct earthing and protection
according to valid national and local standards. All
operations must be carried out by a qualified
electrician.
Warning
All electric supply circuits must be interrupted before
working in the motor terminal box.
Warning
Never make any connections in the motor terminal
box unless the power supply has been switched off
for at least 5 minutes.
Warning
The motor must be earthed and protected against
indirect contact in accordance with national
regulations.
Caution
As the leakage current of 4 kW to 7.5 kW motors is >
3.5 mA, these motors must be connected to
especially reliable/sturdy earth connections.

English (GB)
6
6.3 Additional protection
If the motor is connected to an electric installation where an earth
leakage circuit breaker is used as additional protection, this
circuit breaker must be of the type:
• which is suitable for handling leakage currents and cutting-in
with short pulse-shaped leakage.
• which trips out when alternating fault currents and fault
currents with DC content, i.e. pulsating DC and smooth DC
fault currents, occur.
For these motors an earth leakage circuit breaker type B must be
used.
This circuit breaker must be marked with the following symbols:
The leakage current of the motor can be found in section
12.2 Leakage current.
6.4 Motor protection
The motor requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking (IEC 34-11: TP 211).
6.5 Protection against mains voltage transients
The motor is protected against mains voltage transients
in accordance with EN 61800-3.
6.6 Protection against phase unbalance
The motor must be connected to an power supply with a quality
corresponding to IEC 60146-1-1, class C, to ensure correct motor
operation at a phase unbalance. This also ensures long life of the
components.
6.7 Supply voltage
• 3 x 380-480 V - 10 %/+ 10 %, 50/60 Hz, PE.
The supply voltage and frequency are marked on the motor
nameplate. Please make sure that the motor is suitable for the
power supply on which it will be used.
The wires in the motor terminal box must be as short as possible.
Excepted from this is the protective earth conductor which must
be so long that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
For maximum backup fuse, see section 12.1 Supply voltage.
Fig. 9 Example of a mains-connected motor with mains
switch, back-up fuses and additional protection
Fig. 10 Mains connection
6.8 Start/stop of motor
When the motor is switched on via the mains, it will start after
approx. 5 seconds.
If a higher number of starts and stops is desired, the input for
external start/stop must be used when starting the motor.
When the motor is started via an external on/off switch, it will start
immediately.
Note
When an earth leakage circuit breaker is selected,
the total leakage current of all the electrical
equipment in the installation must be taken into
account.
ELCB
MGE 90 to MGE 132
TM00 9270 4696
MGE 90 to MGE 132
TM02 9035 1504
Warning
If the supply cable is damaged, it must be replaced
by the manufacturer, the manufacturer's service
partner or similarly qualified persons in order to avoid
a hazard.
Caution
The number of starts and stops via the mains voltage
must not exceed 4 times per hour.
L1
L2
L3
L2
L1
L3
PE
ELCB
PE
L3
L2
L1

English (GB)
7
6.9 Other connections
The connection terminals of external potential-free contacts for
start/stop, external setpoint signal and relay signal are shown in
fig. 11.
•Inputs (external start/stop and setpoint signal, terminals 2-6).
All inputs (group 1) are internally separated from the
mains-conducting parts by reinforced insulation and
galvanically separated from other circuits.
All control terminals are supplied by protective extra-low
voltage (PELV), thus ensuring protection against electric
shock.
•Output (relay signal, terminals NC, C, NO).
The output (group 2) is galvanically separated from other
circuits. A maximum supply voltage of 250 V or protective
extra-low voltage can be connected to the output as desired.
•Mains supply (terminals L1, L2, L3, PE).
A galvanically safe separation must fulfil the requirements for
reinforced insulation including creepage distances and
clearances specified in EN 61800-5-1.
Fig. 11 Connection terminals
7. Signal cables
• Use screened cables having a cross-sectional area of min.
0.5 mm2and max. 1.5 mm2for external on/off switch and
setpoint signal.
• The screens of the cables must be connected to frame at both
ends with good frame connection. They must be as close as
possible to the terminals. See fig. 12.
Fig. 12 Stripped cable with screen and wire connection
• Screws for frame connections must always be tightened
whether a cable is fitted or not.
• The wires in the motor terminal box must be as short as
possible.
8. Motor control
The motor can be connected to external signals for
remote-control of the motor output.
8.1 Motor speed control
The motor speed can be set via the setpoint input, terminal 4.
It is possible to use either a 0-10 V signal or a potentiometer.
The motor speed can be set within the range from "minimum
frequency" to the maximum setpoint of 100 %.
Fig. 13 Relation between output frequency and external
setpoint signal
8.2 Start/stop input
The motor can be started and stopped via an external
potential-free contact connected to terminals 2 and 3.
Functional diagram: Start/stop input
Note
If no external on/off switch is connected, short-circuit
terminals 2 and 3 using a short wire.
Caution
As a precaution, the wires to be connected to the
following connection groups must be separated from
each other by reinforced insulation in their entire
lengths:
MGE 90 to MGE 132
TM02 9034 1504
NC C NO L1 L2 L3
10K
RUN
STOP
65432
0/4-20 mA 0-10 V
Change of direction of
rotation
6: GND (frame)
5: +10 V
4: Setpoint input
3: GND (frame)
2: Start/stop
Group 2
Group 3
Group 1
TM02 1325 0901TM02 1326 0901
Start/stop (terminals 2 and 3)
Normal duty
Stop
+
0
100 %
10 V
100 %
0
6
5
4
0 - 10 V 10 k
GND (frame)
+10 VDC
Setpoint input
Maximum setpoint
Minimum
frequency Voltage signal/
potentiometer

English (GB)
8
9. Indicator lights and signal relay
The operating condition of the motor is indicated by the green and
red indicator lights in the motor terminal box. See figs 14 and 15.
Fig. 14 Indicator lights and signal relay in single-phase motors
Fig. 15 Indicator lights and signal relay in three-phase motors
The motor incorporates an output for a potential-free signal via an internal relay. The signal relay is factory-set to "operation". The factory
setting can be changed by means of the PC Tool MGE.
The functions of the two indicator lights and the factory setting of the signal relay are as shown in the following table:
In case of a fault indication, the cause may be one of the
following:
• too high motor temperature
• undervoltage
• overvoltage
• too many restarts (after faults)
•overload
• external fault (e.g. external equipment for dry-running
detection)
A fault indication can be reset in one of the following ways:
• By briefly opening the connection between terminals 2 and 3
(stops the motor).
• By switching off the power supply until the indicator lights are
off.
TM02 0838 0301
Green
Red
Signal relay
TM02 9036 1504
Green
Red
Signal relay
Indicator lights Contact position of
signal relay Description
Fault
(red)
Operation
(green)
Off Off The power supply has been switched off.
Off Permanently on The motor is operating.
Off Flashing The motor has been set to stop.
Permanently on Off
The motor has stopped because of a fault. Restarting will be
attempted (it may be necessary to restart the motor by resetting
the fault indication).
Permanently on Permanently on The motor is operating, but it has been stopped because of a fault.
Permanently on Flashing The motor has been set to stop, but it has been stopped because
of a fault.
Flashing Flashing
Three-phase motors only:
Internal communication fault.
Manual restarting is necessary.
NCNO
C
CNO NC
NCNO
C
NCNO
C
CNO NC
NCNO
C
NCNO
C

English (GB)
9
10. Megging
11. Technical data - single-phase motors
11.1 Supply voltage
• 1 x 230-240 V - 10 %/+ 10 %, 50/60 Hz, PE
• 1 x 200-220 V - 10 %/+ 10 %, 50/60 Hz, PE
• 1 x 220-240 V - 10 %/+ 10 %, 50/60 Hz, PE (MGFlex)
• 110-415 VDC, PE (MGFlex).
Cable: 1.5 mm2/ 14-12 AWG.
See nameplate.
Recommended fuse size
Standard as well as quick-blow or slow-blow fuses may be used.
11.2 Leakage current
Earth leakage current < 3.5 mA.
The leakage currents are measured in accordance with
EN 60355-1.
11.3 Inputs/output
Start/stop
External potential-free switch.
Voltage: 5 VDC.
Current: < 5 mA.
Screened cable: 0.5 - 1.5 mm2/ 28-16 AWG.
Setpoint signals
• Potentiometer
0-10 VDC, 10 k(via internal voltage supply).
Screened cable: 0.5 - 1.5 mm2/ 28-16 AWG.
Maximum cable length: 100 m.
• Voltage signal
0-10 VDC, Ri> 50 k.
Tolerance: + 0 %/- 3 % at maximum voltage signal.
Screened cable: 0.5 - 1.5 mm2/ 28-16 AWG.
Maximum cable length: 500 m.
Signal output
Potential-free changeover contact.
Maximum contact load: 250 VAC, 2 A.
Minimum contact load: 5 VDC, 10 mA.
Screened cable: 0.5 - 2.5 mm2/ 28-12 AWG.
Maximum cable length: 500 m.
12. Technical data - three-phase motors
12.1 Supply voltage
• 3 x 380-480 V - 10 %/+ 10 %, 50/60 Hz, PE.
Cable: 6-10 mm2/ 10-8 AWG.
See nameplate.
Recommended fuse size
Standard as well as quick-blow or slow-blow fuses may be used.
12.2 Leakage current
The leakage currents are measured in accordance with
EN 60355-1.
12.3 Inputs/output
Start/stop
External potential-free switch.
Voltage: 5 VDC.
Current: < 5 mA.
Screened cable: 0.5 - 1.5 mm2/ 28-16 AWG.
Setpoint signals
• Potentiometer
0-10 VDC, 10 k(via internal voltage supply).
Screened cable: 0.5 - 1.5 mm2/ 28-16 AWG.
Maximum cable length: 100 m.
• Voltage signal
0-10 VDC, Ri> 50 k.
Tolerance: + 0 %/- 3 % at maximum voltage signal.
Screened cable: 0.5 - 1.5 mm2/ 28-16 AWG.
Maximum cable length: 500 m.
Signal output
Potential-free changeover contact.
Maximum contact load: 250 VAC, 2 A.
Minimum contact load: 5 VDC, 10 mA.
Screened cable: 0.5 - 2.5 mm2/ 28-12 AWG.
Maximum cable length: 500 m.
Note
Megging of an installation incorporating MGE motors
is not allowed, as the built-in electronics may be
damaged.
Motor size
[kW]
Min.
[A]
Max.
[A]
0.18 to 0.37 6 10
0.55 to 1.1 10 10
Motor size
[kW]
Min.
[A]
Max.
[A]
0.75 to 3.0 10 16
4.0 to 5.5 16 16
7.5 25 32
Motor size
[kW]
Leakage current
[mA]
0.75 to 3.0 (supply voltage < 460 V)
0.75 to 3.0 (supply voltage > 460 V)
< 3.5
< 5
4.0 to 5.5
5.5, 4-pole
< 5
< 10
7.5 < 10

English (GB)
10
13. Other technical data
EMC (electromagnetic compatibility)
EN 61800-3.
Residential areas - unlimited distribution, corresponding to
CISPR 11, class B, group 1.
Industrial areas - unlimited distribution, corresponding to
CISPR 11, class A, group 1.
Contact Grundfos for further information.
Enclosure class
Standard: IP55 (IEC 34-5).
Insulation class
F (IEC 85).
Ambient temperature
• During operation: -20 °C to +40 °C.
• During storage/transport: -40 °C to +60 °C.
Relative air humidity
Maximum 95 %.
13.1 Sound pressure level
Single-phase motors
< 70 dB(A).
Three-phase motors
14. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
Subject to alterations.
Motor
[kW]
Speed stated
on nameplate
[min-1]
Sound pressure
level
[dB(A)]
0.75 1400-1500 52
2800-3000 63
1.1 1400-1500 52
2800-3000 63
1.5 1400-1500 53
2800-3000 63
2.2 1400-1500 52
2800-3000 64
3.0 1400-1500 57
2800-3000 64
4.0 1400-1500 59
2800-3000 68
5.5 1400-1500 59
2800-3000 68
7.5 2800-3000 68